Why clean photoelectric sensors?
There are three photoelectric sensors on M1, corresponding to X-axis, Y-axis and Z-axis respectively. When the machine returns to the origin, the position information is detected by the photoelectric sensor to realise the machine reset. When the M1 is laser processed, a certain amount of smoke will be generated, and the smoke will adhere to these photoelectric sensors. After a long time, the photoelectric sensors may fail and cause a reset failure. Therefore, when the error code of reset failure occurs（Qx14 1、Qx14 2、Qx14 3）, the corresponding photoelectric sensor can be cleaned first to eliminate the fault.
1. Cleaning the X-axis photosensor（Qx14 1）
Insert the cotton swab into the hole on the left side of the laser head assembly, and turn the cotton swab left and right to wipe the X-axis photoelectric sensor. If there is a lot of dirt, use a cotton swab dipped in a little alcohol to wipe it.
2. Cleaning the Y-axis photosensor（Qx14 2）
- Use a Phillips screwdriver to disassemble the bottom plate (due to production batch problems, some machines may have three screws);
- Remove the bottom plate and turn the M1 over;
- Use a cotton swab to gently wipe the Y-axis photoelectric sensor. If there is a lot of dirt, you can use a cotton swab dipped in a little alcohol to wipe it;
3. Cleaning the Z-axis photoelectric sensor（Qx14 3）
Refer to the video in the following link to remove the metal cover and laser fan on the laser head assembly: https://support.xtool.com/hc/en-us/articles/5933587993879-How-to-Replace-the-Z-axis-Adapter-Board-for-M1
Gently lift the Z-axis adapter plate, and then use a cotton swab to gently wipe the Z-axis photoelectric sensor. If there is a lot of dirt, you can use a cotton swab dipped in a little alcohol to wipe it.
Follow the tutorial in the previous video to reinstall the laser head assembly.